期刊
NANOSCALE
卷 7, 期 21, 页码 9878-9885出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr01856k
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资金
- US NSF [DMR-1008791, ECCS-1232275]
- Generalitat de Catalunya
- Spanish Ministerio de Economia y Competitividad (MinECO) [MAT2010-20616-C02, CSD2007-00041, MAT2012-35370]
- U. S. Department of Energy, Office of Science, Materials Science and Engineering Division
- DOE, Office of Science, Basic Energy Science [DE-AC02-06CH11357]
- NSFC [11328402]
- ICREA Academia - Generalitat de Catalunya
- Severo Ochoa Program (MinECO) [SEV-2013-0295]
- Directorate For Engineering [1232275] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1008791] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys [1232275] Funding Source: National Science Foundation
- ICREA Funding Source: Custom
Magnetic vortices have generated intense interest in recent years due to their unique reversal mechanisms, fascinating topological properties, and exciting potential applications. In addition, the exchange coupling of magnetic vortices to antiferromagnets has also been shown to lead to a range of novel phenomena and functionalities. Here we report a new magnetization reversal mode of magnetic vortices in exchange coupled Ir20Mn80/Fe20Ni80 microdots: distorted viscous vortex reversal. In contrast to the previously known or proposed reversal modes, the vortex is distorted close to the interface and viscously dragged due to the uncompensated spins of a thin antiferromagnet, which leads to unexpected asymmetries in the annihilation and nucleation fields. These results provide a deeper understanding of the physics of exchange coupled vortices and may also have important implications for applications involving exchange coupled nanostructures.
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